【摘要】 介绍了在测量透镜焦距实验中，改常规光源为激光光源，使焦点更为集中，从而提高测量精度的方法。更多还原

【Abstract】 In this paper a new method of measuring the focus of lens is introduced . In the experiment ,laser beam is used instead of conventional light source ,so that greater accuracy is obtained.更多还原